dumb·bell 
/ˈdʌmˌbɛl/ noun
plural dumb·bells /ˈdʌmˌbɛl/ noun [count] 1 : a short bar with weights at the ends that is used to make muscles stronger — see picture at gym 2 US, informal : a stupid or foolish person
▪ I feel like a dumbbell for making such a stupid mistake.
▪ I feel like a dumbbell for making such a stupid mistake.
